VOLVOUU All Engines (2017 Emissions) Fault Code: P04DD00 PID: EMS Cold Start EGR “A” Flow Insufficient Detected

VOLVOUU All Engines (2017 Emissions) Fault Code: P04DD00 PID: EMS Cold Start EGR “A” Flow Insufficient Detected

The EGR Valve operation is controlled by the Engine Control Module (ECM) using a pulse width modulated signal.  The ECU provides both the power and ground circuits. The EGR Valve assembly consists of a solenoid, operating a valve by hydraulic pressure provided by the engine’s oiling system.

Conditions for diagnostic trouble code (DTC):
1) EGR mass flow is below calculated value
2) The EGR mass flow is an calculated value based on a number of sensor signals and software calculations

Probable cause
1) EGR System
2) Connector
3) Wiring harness
4) EGR differential pressure sensor
5) EGR Valve